2(3x+3)-4(5x-3)=x(x-3)

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Solution for 2(3x+3)-4(5x-3)=x(x-3) equation:


Simplifying
2(3x + 3) + -4(5x + -3) = x(x + -3)

Reorder the terms:
2(3 + 3x) + -4(5x + -3) = x(x + -3)
(3 * 2 + 3x * 2) + -4(5x + -3) = x(x + -3)
(6 + 6x) + -4(5x + -3) = x(x + -3)

Reorder the terms:
6 + 6x + -4(-3 + 5x) = x(x + -3)
6 + 6x + (-3 * -4 + 5x * -4) = x(x + -3)
6 + 6x + (12 + -20x) = x(x + -3)

Reorder the terms:
6 + 12 + 6x + -20x = x(x + -3)

Combine like terms: 6 + 12 = 18
18 + 6x + -20x = x(x + -3)

Combine like terms: 6x + -20x = -14x
18 + -14x = x(x + -3)

Reorder the terms:
18 + -14x = x(-3 + x)
18 + -14x = (-3 * x + x * x)
18 + -14x = (-3x + x2)

Solving
18 + -14x = -3x + x2

Solving for variable 'x'.

Combine like terms: -14x + 3x = -11x
18 + -11x + -1x2 = -3x + x2 + 3x + -1x2

Reorder the terms:
18 + -11x + -1x2 = -3x + 3x + x2 + -1x2

Combine like terms: -3x + 3x = 0
18 + -11x + -1x2 = 0 + x2 + -1x2
18 + -11x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
18 + -11x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-18 + 11x + x2 = 0

Move the constant term to the right:

Add '18' to each side of the equation.
-18 + 11x + 18 + x2 = 0 + 18

Reorder the terms:
-18 + 18 + 11x + x2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + 11x + x2 = 0 + 18
11x + x2 = 0 + 18

Combine like terms: 0 + 18 = 18
11x + x2 = 18

The x term is 11x.  Take half its coefficient (5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
11x + 30.25 + x2 = 18 + 30.25

Reorder the terms:
30.25 + 11x + x2 = 18 + 30.25

Combine like terms: 18 + 30.25 = 48.25
30.25 + 11x + x2 = 48.25

Factor a perfect square on the left side:
(x + 5.5)(x + 5.5) = 48.25

Calculate the square root of the right side: 6.946221995

Break this problem into two subproblems by setting 
(x + 5.5) equal to 6.946221995 and -6.946221995.

Subproblem 1

x + 5.5 = 6.946221995 Simplifying x + 5.5 = 6.946221995 Reorder the terms: 5.5 + x = 6.946221995 Solving 5.5 + x = 6.946221995 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + x = 6.946221995 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = 6.946221995 + -5.5 x = 6.946221995 + -5.5 Combine like terms: 6.946221995 + -5.5 = 1.446221995 x = 1.446221995 Simplifying x = 1.446221995

Subproblem 2

x + 5.5 = -6.946221995 Simplifying x + 5.5 = -6.946221995 Reorder the terms: 5.5 + x = -6.946221995 Solving 5.5 + x = -6.946221995 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + x = -6.946221995 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = -6.946221995 + -5.5 x = -6.946221995 + -5.5 Combine like terms: -6.946221995 + -5.5 = -12.446221995 x = -12.446221995 Simplifying x = -12.446221995

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.446221995, -12.446221995}

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